紫外老化对玻璃纤维增强环氧树脂基复合材料疲劳性能的影响

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (7): 74-80.

紫外老化对玻璃纤维增强环氧树脂基复合材料疲劳性能的影响

付晨阳¹, 倪爱清², 王继辉^1*, 孙亮亮¹

1.武汉理工大学材料科学与工程学院,武汉430070;
2.武汉理工大学材料复合新技术国家重点实验室,武汉430070

收稿日期:2019-11-01 出版日期:2020-07-28 发布日期:2020-07-28
通讯作者: 王继辉(1962-),男,博士,教授,主要从事纤维增强树脂基复合材料等方面的研究,jhwang@whut.edu.cn。
作者简介:付晨阳(1995-),男,硕士,主要从事纤维增强树脂基复合材料耐候性能方面的研究。
基金资助:
中央高校基本科研业务费专项资金资助(2019-zy-036)

EFFECTS OF UV AGING ON FATIGUE PROPERTIES OF GLASS FIBER REINFORCED EPOXY RESIN COMPOSITES

FU Chen-yang¹, NI Ai-qing², WANG Ji-hui^1*, SUN Liang-liang¹

1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Received:2019-11-01 Online:2020-07-28 Published:2020-07-28

摘要/Abstract

摘要： 以玻璃纤维/环氧树脂复合材料为研究对象,研究紫外老化对复合材料疲劳性能的影响。利用扫描电镜、红外光谱和动态热力学分析对复合材料的微观形貌、化学结构和动态力学行为进行测试分析。研究表明:紫外线照射使环氧树脂发生了光氧老化降解,破坏了链段中的化学键,环氧树脂发生脱落,使树脂与纤维的结合变得薄弱,界面部分区域发生了脱粘。紫外老化28 d后,复合材料静拉伸强度下降了18%。拉-拉疲劳实验表明,紫外老化对复合材料低周疲劳的影响大于对高周疲劳的影响。紫外老化后复合材料的刚度退化速率和退化幅度均高于未老化试样,表明紫外老化使复合材料的疲劳性能下降。

关键词: 紫外老化, 复合材料, 环氧树脂, 疲劳, 化学结构

Abstract: In this paper, the effects of UV aging on fatigue properties of glass fiber reinforced epoxy resin composite materials were studied. The microstructure, chemical structure and dynamic mechanical behavior of the composite materials were analyzed by SEM, FTIR and DMA. The results show that UV irradiation causes photodegradation of epoxy resin, breaks the chemical bond or intermolecular force in the chain segment, weakens the bond between resin and fiber, and disbonds part of the interface. After 28 days of UV aging, the static tensile strength of the composites decreased by 18%. The tension-tension fatigue tests show that the effect of UV aging on low cycle fatigue of composites is greater than that of high cycle fatigue. The degradation rate and extent of the stiffness of the composite materials after UV aging are higher than those of unaged samples, indicating that it is the UV aging that caused the decrease of the fatigue properties of the composite materials.

Key words: UV aging, composite material, epoxy resin, fatigue, chemical structure

中图分类号:

TB332

付晨阳, 倪爱清, 王继辉, 孙亮亮. 紫外老化对玻璃纤维增强环氧树脂基复合材料疲劳性能的影响[J]. 复合材料科学与工程, 2020, 0(7): 74-80.

FU Chen-yang, NI Ai-qing, WANG Ji-hui, SUN Liang-liang. EFFECTS OF UV AGING ON FATIGUE PROPERTIES OF GLASS FIBER REINFORCED EPOXY RESIN COMPOSITES[J]. Composites Science and Engineering, 2020, 0(7): 74-80.

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